Merriway® BH01780 (2 Pcs) Door Security Hinge Side Protection Steel Bolts and Plates BZP - Pack of 2 Pieces

Fantastic product, fast shipping grate item, 10/10

Feel sturdy and weren't too hard to install even for me who is an occasional DIYer:Wooden door and frame.1 - Drill hole at around 50mm under your top door hinge, well centered to your door hedges, (description says with a 8mm bit but I had to use a 9mm) at a depth equal to the inset part of the bolt (was 41mm for me), quick tip: measure the depth on your drill bit and put tape around your drill bit at this mark.2 - Insert the bolt with mallet hammer until the bolt head blocks.3 - Gently close the door until the bolt make a tiny mark on your door frame4 - At the exact point left onto the frame drill a 15mm hole at a depth equal to the length of the bolt head (I only had a 16mm drill bit so used that)5 - Verify you can normally close your door now6 - Open your door again and with a pencil draw the hedge of the plate when well aligned with the frame hole.7 - With a chisel chop out the wood in the inner part where your plate will go, at a 2mm depth8 - Position your plate, screw it9 - Verify your door closes normally : Done !10 - repeat operation with a second bolt at around 50mm above the bottom hinge

The bolts are easy to fit, and if done right, they look good. I am happy with them. However, 1 set was missing from a pack, and they come with two sets. I found that a few packs were open upon delivery, with lots of bits all over the place in the box also. The box had no damage, so it can't have fell out. I give 4 stars.

I fitted two pair of these to double shed doors. They appear good quality and do the job. I had a slightly oversize drill bit for the door fit and used a glue to enhance the fit. Fitting the standing part requires a larger (wider) hole to accommodate the sweep of the bolt. The bolt end is bevelled with helps it enter the hole.With these bolts the only way through the shed doors is to destroy the doors.I have a set of rasp drill bits and this made it much easier to cut out the oval hole.

These are actually a good deal beefier than I would have thought. Easy to fit, just drill an 11mm hole in the door and hammer the 'bolt' in, then close the door till the bolt contacts the door frame and give it a nudge so that it makes an imprint in the timber. Then use this imprint to drill a 15mm hole and fit the recess plate. Job done, total time to fit less than five minutes. I used 6 of these in some double garage doors and I can tell it'd be a bear of a job to rip the doors off with these in now. Slight issue with picking with the seller, only sent me one pack when I ordered three but was resolved pretty much instantly.

Easy to fit and adds a little bit of extra security if you think someone may kick your door in.

Good strong metal.

I drilled the 8mm hole and knocked it in but it took a hell of a lot of banging to get them in, the end was mushroomed over by the time it was fully in. Also the pack didn't include screws.Functions as it should now it's installed but installation was a pain..

These took an hour to install on one door. The install was strightforward, just took the time to visualize the geometry of the stud moving into the jam. No biggie...Drill a 5/16 hole in the center of the door (follow the directions), then drive in the stud. Close the door SLOWLY and softly until the stud leaves an impression on the jam. Drill a hole of at least 1/2 inch in the jam using the impression as a guide (hint: favor the sides of the impression just a little, so the hole is more oval than round.) Try to close the door. If the stud catches or "springs" the door, remove material from the sides of hole until the door closes as it should.Easy, no? Very solid, no chance of pulling the door. Muis bueno!

Bolt looks beefy. The illustration on the included installation instructions appears to flip the door frame and door.The instructions call for 8mm and 25mm drill bits. A 5/16" drill bit (just a fraction of a millimeter smaller than 8mm) might be too small because the wood split when I hammered the bolt into the door.You have to make an oval shaped hole to accommodate the bolt's arc path into the door frame.